use FindPTSCOTCH from morse cmake (more complete)

2 jobs for gitlab-ci in 59 seconds
Status Job ID Name Coverage
  Build
failed #92107
build_pampa

00:00:59

 
  Test
skipped #92108
test_pampa
 
Name Stage Failure
failed
build_pampa Build There is an unknown failure, please try again
make[1]: *** [src/samples/C/CMakeFiles/redist2_17-vert_it_comm3_c.dir/all] Error 2
CMakeFiles/Makefile2:824: recipe for target 'src/samples/C/CMakeFiles/redist2_17-vert_it_comm3_c.dir/all' failed
make[2]: Leaving directory '/builds/PaMPA/PaMPA-p/build'
[ 38%] Built target save_load_17-vert_it_comm_c
make[1]: Leaving directory '/builds/PaMPA/PaMPA-p/build'
Makefile:141: recipe for target 'all' failed
make: *** [all] Error 2
scan-build: Run 'scan-view /builds/PaMPA/PaMPA-p/analyzer_reports/scan-build-2018-04-23-15-45-59-676359-0CxFad' to examine bug reports.
ERROR: Job failed: exit code 1